A $12,000 reward has been offered for information on the whereabouts of a teenage girl who police say was kidnapped toward the end of her shift at a coffee stand in Anchorage, Alaska.

Samantha Koenig, 18, was last seen Wednesday evening on surveillance video that showed her leaving the Common Grounds Espresso stand with an armed man, who police said was wearing a dark hooded sweatshirt and possibly a baseball cap.

All of the coffee stand's cash was also missing.

Koenig filed for a protective order against a man in November, the Alaska Daily News reported, however the order was not issued after she failed to appear in court.

The newspaper reported at least two dozen detectives are working to sort through leads in the case.

"This isn't in Samantha's nature. She's a good-hearted girl. This doesn't need to be happening to her, so we need to find her as soon as possible," said Koenig's boyfriend of nine months, who asked to be referred to by his first name, Dwayne.

Koenig's father announced at a press conference today that a $12,000 reward, donated by friends and family, is now being offered for information about his daughter's whereabouts.

Koenig's friends and family are collecting donations to put towards the reward.